Method of making celluloid tubes.



J. N. WHITEHOUSE- MBTHoD 0F MAKING GBLLULOID TUBES.

APPLICATION FILED IFBB. 9, 1914.

Patented Jan, 19, 1915.

En. STATES Pris nieu.

JOHN NATZI WHITEHOUSE, F NEWARK, NEW JERSEY. METHOD 0F MAKING CELLULOID TUBES.

1,125,893. Specification of Letters Patent Patented Jan. 119, l 911 5..

' Application led February 9, 1914. Serial N o. 817,542.

To aZZfw/om- 'it may concern: of the tube. Accordingly, I provide a cye it known that I, JOHN N. VVHrrEHoUsn, lindrical former indicated by the numeral 8. a citizen of the United States, residing at I next take a sheet of Celluloid or other Newark, in the county of Essex and State suitable material indicated by the numeral 9 of New Jersey, have-invented certain new of proper Width and of length not greater and useful Improvements in Methods of than that of the cylinder', andv insert the Making Celluloid Tubes, of which the fol same within the formerl ,8 as shown in Figs. lowing is a specication. l l and As stated, the sheet is cut of the This invention relates to Celluloid tubes proper width so that when it is placed with 6,5 10 such as are useful for fountain-pen caps and in the cylindrical former the longitudinal barrels like those shown in my Patent No. edges l0 thereof will abut. Next I take a 836,905, granted November 27th, 1906, and rod ll of suitable diameter and insert it to the method ofy manufacturing such tubes. longitudinally between the inner wall of the The characteristic features of the tube cylindrical former and the outer face of the 70 made in accordance with this invention will Celluloid sheet 9, so that said rod will lie be clear from the specification, and the substantially opposite the line of the abutmethod employed in making it will appear ting edges l'O. The effect of thus introducfrom the following description ofl the variing the rod 1l is to urge the abutting edgesI ous steps thereof, While the scope of protec- 10 of the Celluloid sheet positively toward 75 tion contemplated will appear from the each other,` so that when I proceed to soften claims. f the inner edge portions of the Celluloid sheet, In the accompanying drawing, which is as by passing over them a brush carrying a to be taken as a part of this specification, suitable soli'ent,the softened edge portions and in which I have shown a preferred form will be merged into one another under the. 80 of embodiment ofthe'tube constituting the continued pressure produced by the rod 11. invention, and in which I have also indi- Ihave indicated the area of softening by the Gated the method'of manufacture: Figure l reference character l2 in Figs. 3 and 4. is a longitudinal section showing a sheet of The result of the operations thus far decelluloid material in position within an scribed 'xill obviously be to Weld together 85 outer cylindrical former, whereby the sheet the abuttingedges of the celluloid sheet, so is given a tubular form. This view is taken that a tube will be formed. But obviously on the line l1 of Fig. 2; Fig. 2 is a transthe tube is apt to be Weak along the line Verse section taken on the line 9.-2 of Fig. of the Weld, and in order to strengthen it l; Fig. .3 is a View similar to Fig. l, incliat this point, I propose to cover the tube 90 3'5 cating the softening of the abutting edge interiorly over the abutting edge portions portions of the Celluloid sheet within the with a reinforce strip 14, which may be of cylindrical former, this View being taken on silk or other suitable material. And in ortheline 3-3 of Fig. 4; Fig. 4 is a transverse der to insure that the reinforce strip shall section on the line 4 4 of Fig. 3, and shows -become practically an integral part of the 95 40 also how the abutting edges of the Celluloid tube, I propose to force the strip down into sheet are positively urged toward each the abutting edge portions While these porother; Fig. 5 is a View, similar to Fig. 3, tions are still soft from the solvent. This showing the reinforce strip in place over the may be accomplished, for instance, by placabutting edge portions of the celluloid sheet ing the strip in the tube while .the latter is 10o l5 `Within the cylindrical former, this vievi7 bestill within the cylindrical former, over the ing taken on the line 5`5 of Fig. 6; Fig. 6 softened edge portions, with the ends of is a transverse section on the line 6-6 of the strip projecting out of the ends of the Fig. 5;.and Fig. 7 is a perspective View, tube. If both ends of the strip are now partly broken away, illustrating the mode simultaneously drawn down, or if one end `0 of applying the reinforce member to the is held and the other end drawn down, the abutting edges of the Celluloid strip after result will be of course to force the Whole the latter has been given its tubular form. length of the strip inside the tube down into Referring to the numerals on the draW- the softened edge portions of the tube, so ings, the method of making thetube Will be 'that the softened Celluloid material Will be 11o y 5 described. and from this a clear understanddriven into the interstitial spaces of the silk ing may be had of thecharacteristic features reinforce strip, and the abutting edges of the sheet will be thoroughly amalgamated witheach other and with their common reinforcing strip. The longitudinal rod 11 is now withdrawn, whereupon the completed tube may be readily taken out of the cylindrical former. In order that the ,withdrawal of the completed tube may be as easy as possible, and in order to avoid sticking thereof within the cylindrical former, I prefer that at the outset the celluloid sheet shall be of such width that j when it is inserted into the cylindrical former as shown in Fig. 2, and springs into face-contact with the interior of the cylindrical former, that the edges 10 shall not be in contact. Thus when the member 11 is introduced. the edges 10 are driven togethei` and the tube, after the 'edges have been joined together, will be of sufficiently smaller diameter than the cylindrical former l so that it may be easily withdrawn.

It is to be understood that material, sizes and relations of parts are unimportant except as set out in the claims. And obviously there may be many changes in the character and sequence of the steps of operation described, without departing from the spirit Y of the invention.

formed within the cylinder so as to urge the adjacent edges thereof into contact and Jholding it temporarily so deformed, softening the edge portions of the tube thus deformed, overlaying the edge portions with a reinforcing strip of silk or the like, and driving said Vstrip down into the celluloid material so as to form a unitary structure, causing the previously softened material of the edge portions to harden afterthe edges have coalesced with each other and with the reinforcing strip, permitting the tube to assume its natural shape, and withdrawing it from the cylindrical former.

2. The method which consists in providing jacency but out of contact, deforming theI celluloid tube thus formed within the cylinder so as to urge the adjacent edges thereof into contact and holding it temporarily so deformed, softening the edge portions of the tube thus deformed, overlaying the edge portions with a reinforcing strip of silk or the like, and driving said strip down into the celluloid material so as to form a unitary structure, causing thepreviously softened material of the edge portions to harden after the edges havev coalesced with each other and with the reinforcing strip, permitting the tube to 'assume its natural shape, and withdrawing it from the cylindrical former. l

In testimony whereof I affix my signature in presence of two witnesses.

JOI-IN NATZI WHITEI-IOUSE.

Witnesses:

ALDA L. MILLER, HELEN V. FxrzPA'rRIcii.' 

